// SAX parser interface.// http://www.saxproject.org// No warranty; no copyright -- use this as you will.package org.xml.sax;import java.io.IOException;import java.util.Locale;/** * Basic interface for SAX (Simple API for XML) parsers. * * <blockquote> * <em>This module, both source code and documentation, is in the * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em> * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a> * for further information. * </blockquote> * * <p>This was the main event supplier interface for SAX1; it has * been replaced in SAX2 by {@link org.xml.sax.XMLReader XMLReader}, * which includes Namespace support and sophisticated configurability * and extensibility.</p> * * <p>All SAX1 parsers must implement this basic interface: it allows * applications to register handlers for different types of events * and to initiate a parse from a URI, or a character stream.</p> * * <p>All SAX1 parsers must also implement a zero-argument constructor * (though other constructors are also allowed).</p> * * <p>SAX1 parsers are reusable but not re-entrant: the application * may reuse a parser object (possibly with a different input source) * once the first parse has completed successfully, but it may not * invoke the parse() methods recursively within a parse.</p> * * @deprecated This interface has been replaced by the SAX2 *             {@link org.xml.sax.XMLReader XMLReader} *             interface, which includes Namespace support. * @since SAX 1.0 * @author David Megginson * @version 2.0.1 (sax2r2) * @see org.xml.sax.EntityResolver * @see org.xml.sax.DTDHandler * @see org.xml.sax.DocumentHandler * @see org.xml.sax.ErrorHandler * @see org.xml.sax.HandlerBase * @see org.xml.sax.InputSource */public interface Parser {        /**     * Allow an application to request a locale for errors and warnings.     *     * <p>SAX parsers are not required to provide localisation for errors     * and warnings; if they cannot support the requested locale,     * however, they must throw a SAX exception.  Applications may     * not request a locale change in the middle of a parse.</p>     *     * @param locale A Java Locale object.     * @exception org.xml.sax.SAXException Throws an exception     *            (using the previous or default locale) if the      *            requested locale is not supported.     * @see org.xml.sax.SAXException     * @see org.xml.sax.SAXParseException     */    public abstract void setLocale (Locale locale)	throws SAXException;            /**     * Allow an application to register a custom entity resolver.     *     * <p>If the application does not register an entity resolver, the     * SAX parser will resolve system identifiers and open connections     * to entities itself (this is the default behaviour implemented in     * HandlerBase).</p>     *     * <p>Applications may register a new or different entity resolver     * in the middle of a parse, and the SAX parser must begin using     * the new resolver immediately.</p>     *     * @param resolver The object for resolving entities.     * @see EntityResolver     * @see HandlerBase     */    public abstract void setEntityResolver (EntityResolver resolver);            /**     * Allow an application to register a DTD event handler.     *     * <p>If the application does not register a DTD handler, all DTD     * events reported by the SAX parser will be silently     * ignored (this is the default behaviour implemented by     * HandlerBase).</p>     *     * <p>Applications may register a new or different     * handler in the middle of a parse, and the SAX parser must     * begin using the new handler immediately.</p>     *     * @param handler The DTD handler.     * @see DTDHandler     * @see HandlerBase     */    public abstract void setDTDHandler (DTDHandler handler);            /**     * Allow an application to register a document event handler.     *     * <p>If the application does not register a document handler, all     * document events reported by the SAX parser will be silently     * ignored (this is the default behaviour implemented by     * HandlerBase).</p>     *     * <p>Applications may register a new or different handler in the     * middle of a parse, and the SAX parser must begin using the new     * handler immediately.</p>     *     * @param handler The document handler.     * @see DocumentHandler     * @see HandlerBase     */    public abstract void setDocumentHandler (DocumentHandler handler);            /**     * Allow an application to register an error event handler.     *     * <p>If the application does not register an error event handler,     * all error events reported by the SAX parser will be silently     * ignored, except for fatalError, which will throw a SAXException     * (this is the default behaviour implemented by HandlerBase).</p>     *     * <p>Applications may register a new or different handler in the     * middle of a parse, and the SAX parser must begin using the new     * handler immediately.</p>     *     * @param handler The error handler.     * @see ErrorHandler     * @see SAXException     * @see HandlerBase     */    public abstract void setErrorHandler (ErrorHandler handler);            /**     * Parse an XML document.     *     * <p>The application can use this method to instruct the SAX parser     * to begin parsing an XML document from any valid input     * source (a character stream, a byte stream, or a URI).</p>     *     * <p>Applications may not invoke this method while a parse is in     * progress (they should create a new Parser instead for each     * additional XML document).  Once a parse is complete, an     * application may reuse the same Parser object, possibly with a     * different input source.</p>     *     * @param source The input source for the top-level of the     *        XML document.     * @exception org.xml.sax.SAXException Any SAX exception, possibly     *            wrapping another exception.     * @exception java.io.IOException An IO exception from the parser,     *            possibly from a byte stream or character stream     *            supplied by the application.     * @see org.xml.sax.InputSource     * @see #parse(java.lang.String)     * @see #setEntityResolver     * @see #setDTDHandler     * @see #setDocumentHandler     * @see #setErrorHandler     */    public abstract void parse (InputSource source)	throws SAXException, IOException;            /**     * Parse an XML document from a system identifier (URI).     *     * <p>This method is a shortcut for the common case of reading a     * document from a system identifier.  It is the exact     * equivalent of the following:</p>     *     * <pre>     * parse(new InputSource(systemId));     * </pre>     *     * <p>If the system identifier is a URL, it must be fully resolved     * by the application before it is passed to the parser.</p>     *     * @param systemId The system identifier (URI).     * @exception org.xml.sax.SAXException Any SAX exception, possibly     *            wrapping another exception.     * @exception java.io.IOException An IO exception from the parser,     *            possibly from a byte stream or character stream     *            supplied by the application.     * @see #parse(org.xml.sax.InputSource)     */    public abstract void parse (String systemId)	throws SAXException, IOException;    }// end of Parser.java